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    A GIS-based land evaluation model for peach cultivation by using AHP: a case study in NW Turkey
    (Springer, 2022) Everest, Timucin; Gur, Engin
    Crop-based land suitability studies constitute an important component of precision and sustainable agricultural practices. In this study, a model was created to determine suitable lands for peach farming with the use of the analytic hierarchy process (AHP). The land suitability model was carried out in Derekolu region of Bayramic town of canakkale province. Within the scope of the study, a total of 12 parameters, namely soil depth, soil texture, EC, pH, organic matter content, CaCO3 content, nitrogen, phosphorus, potassium, elevation, aspect, and slope, were used. Present assessments revealed that of the assessed lands, 367.50 ha was highly suitable, 7085.25 ha moderately suitable, 6341.25 ha marginally suitable, and 378.50 ha not suitable for peach cultivation. Texture, slope, and CaCO3 content were respectively identified as the most effective factors in peach cultivation. The combined use of AHP and GIS techniques in the identification of suitable lands for peach farming facilitated assessments and provided significant advantages in terms of time and economic aspects. Further research is recommended to test the validity of the present model for different geographies under different climate and soil conditions.
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    Effects of Preharvest Foliar Calcium Applications on the Storage Quality of '0900 Ziraat' Sweet Cherry Cultivar
    (Springer, 2016) Ekinci, Neslihan; Ozduven, Funda; Gur, Engin
    The objective of this study was to investigate effects of foliar calcium application on storage of sweet cherry. Different concentrations of CaCl2 (2.4, 3.2, and 4.0 g/l) and Ca(NO3)(2) (3.4, 4.6, and 5.8 g/l) were applied six times by foliar spraying on leaves and fruits of the sweet cherry variety '0900 Ziraat'. Harvested fruits were packaged in 500 g plastic boxes and stored for four weeks at 0 C-0 and 90-95 % relative humidity. During the experiment, flesh firmness, titratable acidity value (TA), pH, total soluble solids content (SSC) ratio, and weight losses were weekly assessed. The results indicated that there were positive effects of foliar calcium applications on fruit quality coupled with improved firmness, and enhancement of TA, an additional advantage for consumer acceptability. It was found that lower concentrations of both calcium treatments were not affective. On the other hand, 3.2 g/l calcium chloride and 4.6 g/l calcium nitrate were advised. Higher concentrations (4.0 g/l calcium chloride and 5.8 g/l calcium nitrate) caused a decrease in fruit quality through deformations on the fruit surfaces, especially after the third week of storage.
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    ESTIMATION OF HEAVY METAL FRACTIONS, SOURCES AND UPTAKE BY PLANTS IN CHERRY ORCHARDS (CANAKKALE-LAPSEKI, NORTHWESTERN TURKEY)
    (Parlar Scientific Publications (P S P), 2018) Gur, Engin; Sungur, Ali
    The contamination of agricultural land with heavy metals due to human activities raises environmental and health concerns. The purpose of this study is to analyze the geochemical fractions of heavy metals in cherry orchard soils, their potential sources, and the correlation between heavy metals in different fractions and the amount of heavy metal uptake by cherry trees. To that end, soil and leaf samples were taken from a total of ten cherry orchards located in the district of Lapseki (Canakkale, Turkey) with great potential for cherry production. The elements Cd, Cr, Cu, Ni, Pb and Zn in the samples were extracted into solvent by means of sequential extraction, using a different solvent system at each step, and the concentrations of the metals were determined via inductively coupled plasma-optical emission spectroscopy (ICP-OES). The analysis of the total content of heavy metals in the soils indicated that the metals were above the average agricultural land values, except for Cr and Zn. The results of the sequential extraction method showed that the percentage in the mobile phase was high for the elements Pb (73%), Cu (66%) and Zn (57%) and this originated from anthropogenic sources. These findings were further supported by the statistical analyses performed in the study. Principal component analysis pointed to three main sources for heavy metals: lithogenic sources for Cr and Ni; a combination of anthropogenic and lithogenic sources for Cd, Cu and Zn; and anthropogenic sources for Pb. The data were examined with hierarchical cluster analysis to investigate the correlation between the amount of heavy metals in each fraction of the soil samples and the amount of heavy metals in cherry leaves. The analysis demonstrated that there was a strong correlation between the heavy metals in cherry leaves (except for Cr and Ni) and more available fractions (acid soluble and reducible).